The PowerShot SD880 IS measures 3.69 x 2.24 x 0.93, with a zoom of 4.0 and 10.0 megapixels. The dimensions of the PowerShot SD850 IS are 3.56 x 2.22 x 1.04”. It can zoom 4.0 and has 8.0 megapixels. The PowerShot SD870 IS’s dimensions are 3.65 x 2.32 x 1.02” with 8.0 megapixels and a zoom of 4.0.

Digital Camera Dimensions: Nikon

The Coolpix S550 measures 2.00 x 3.47 x 0.87; it has 10.0 megapixels with a zoom of 5.0. The Coolpix S600 is 2.10 x 3.50 x 0.90”. The megapixels are 10.0 and the zoom 4.0.

The Coolpix S520 dimensions are 2.09 x 3.70 x 0.89. It has 8.1 megapixels with 3.0 zoom. The Coolpix S560 has a zoom of 5.0 and 10.0 megapixels. It measures 2.10 x 3.70 x 0.90”.

The digital camera dimensions are vital, but you should also consider the megapixels, the video codec and other features. Try to balance between getting a portable unit and one with the features you need.